NHS - is it in crisis?

This week the Red Cross called the state of the NHS a humanitarian crisis.

 According to the BBC leaked documents show there is a crisis in NHS A&E departments.
Royal College of Physicians has written an open letter to the Prime Minister on the state of the NHS

Campaign groups that share this opinion include:
NHS Support Federation
in 2016 they analysed the winter NHS crisis
BMA survey of doctors showed the majority felt NHS was less prepared than in earlier years.
they has also produced research briefings on the nature and extent of strain on the NHS
Royal College of Emergency Medicine
Their winter flow project examines the flow of patients in A&E departments. In december they recorded only 78.69% of patients were seen within the four hour target.

NHS data
Official data on the situation can be found on the NHS England site which has winter daily situation reports. These are collected from acute trusts each weekday during winter and include data on areas such as A&E closures and diverts or bed pressures. The site has historic data from 2012-13
There are also bed availability and occupancy reports. 
NHS evidence is a useful place to search for references to recent NHS reports, articles and policy reports 

Here are some useful sites/ resources which discuss the evidence.

Kings Fund - Urgent and Emergency project.
Has quarterly monitoring reports on the preformance of the NHS
According to the latest report the NHS faces a 'difficult winter due to increased demand'

Nuffield Trust has reviewed levels of pressure in the NHS . It has also published papers on understanding bed occupancy rates.
they are now producing winter insight briefings. The first one covers winter beds.

Health select committee inquiry, meetings and reports